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Loop test
External Mic to
HS_MIC &
External
GND
Earpiece
External Mic to
HS_MIC &
Internal
GND
Earpiece
External Mic to
HS_MIC &
Internal
GND
handsfree
Digital Mic to
Acoustical
External
input, 1kHz
Earpiece
sine wave
Measurement data
Earpiece signal
Figure 31 Single-ended output waveform of the Ext_in_HP_out measurement when earpiece is connected.
Integrated handsfree signal
Page 3 –60
Input
Output
terminal
terminal
HS_EAR_L &
GND
HS_EAR_R &
GND
EarP & GND
EarN & GND
J2100
J2101
HS_EAR_L &
GND
HS_EAR_R &
GND
COMPANY CONFIDENTIAL
Copyright © 2008 Nokia. All rights reserved.
BB Troubleshooting and Manual Tuning Guide
Path
Input
Output
gain
voltage
voltage
[dB]
[mVp-
[mVp-p]
(fixed)
p]
-8.6
1000
367
-10
1000
310
-6
1000
NA
94 dB
100
SPL
RM-356
Output
Output
DC level
current [mA]
[V]
1.2
NA
1.2
NA
NA
Issue 1
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